Self-heating sad-iron.



m. 636,059; Patented Oct. 3|, I899.

w. PITT. SELF HEATING SAD IRON.

(Application filed Oct. 29, 1898.)

(No Model.)

I Invenior gJ z m William 611$.

NITED STATES PATENT OFFICE.

WILLIAM PITT, OF INDEPENDENCE, MISSOURI, ASSIGNOR TO, B. 0. SMITH,

OF KANSAS CITY, MISSOURI, AND J. H. MERCHANT AND OF OMAHA, NEBRASKA.

M. H. REDFIELD,

SELF-HEATING SAD-IRON.

SPECIFICATION forming part of Letters Patent No. 636,059, dated October 31, 1899.

Application filed October 29, 1898- Serial No. 694,877. (No model.)

To all whom, it may concern:

Be it known that I, WILLIAM PITT, of Independence, Jackson county, Missouri, have invented certain new and useful Improvements in Self-Heating Sad-Irons,of which the following is a specification.

My invention relates to self-heating sadirons; and my objects are to produce, first, a sad-iron wherein the ironing-surface can be brought to the requisite temperature without unduly heating the handle or the tank; secondly, a self-heating sad-iron of such construction that the burned and noxious gases shall be prevented from entering the mixingchamber and giving the iron an objectionable odor; thirdly, an iron wherein the cover may be quickly and reliably secured to the hollow base and hold the heat-generator reliably therein; fourthly, an iron of the character outlined which is comparatively simple, strong, durable, and inexpensive of construction.

WVith these objects in view the invention consists in certain novel and peculiar features of construction and combinations of parts, as will be hereinafter described and claimed, and in order that the invention may be fully understood reference is to be had to the accompanying drawings, in which Figure 1 is a longitudinal section of my improved self-heating sad-iron, taken on the line I I of Fig. 3. Fig. 2 is a section taken on the line II II of Fig. 1. Fig. 3 is a top plan view of the hollow base portion of the iron. Fig. 4 is a top plan view of part of the handlecarrying top plate or cover of the iron and shows mounted thereon the rotatable disk for actuating the bolts which secure said top plate or cover to the hollow base portion. Fig. 5 is an inverted plan view of said cover. Fig. 6 is a vertical cross-section near the front end of the iron.

In the said drawings, where similar numerals designate like parts, 1 designates the 1101- low base portion of an iron of the usual or any preferred configuration, and said hollow base portion is provided at its front end and upper edge with a notch 2 and at its rear end with a large deep notch 3.

to the bottom of said base portion.

5 designates a flange projecting upward from the bottom of the hollow base portion at the lower end of said notch 3, and 6 a pair of ears which project upward from the middle of the side walls of the base-plate, and said side walls opposite the center of the iron are formed with holes or apertures 7, the upper sides of which slope downward and outward for a purposewhich will hereinafter appear. The side walls of the hollow base portion between said ears and the notch 2 are recessed, as at 8, to provide slots or passages, hereinafter referred to, through which the burned gases and other products of combustion may escape.

9 designates a shallow channel which is formed in the bottom of the hollow base por tion and extends from the flange 5 thereof nearly to the front end of said portion, and flanking said channel at either side are the vertical pins 10, said pins being formed in two rows by preference, with one series staggered with relation to the other in order to obstruct the gas, and by retarding the outward passage of the same to either side extract and conduct practically all of the heat generated directly The iron is also provided internally with lugs 11, the upper ends of which occupy, preferably, the same horizontal plane as the upper ends of the pins 10.

' 12 designates the top or cover for and of substantially the same configuration as the iron. Said top or cover is provided at its upper side and ends with the bosses 13, through which project upward the screws 14;, which engage the ends of the wood or equivalent handle 15 and secure it reliably to the top or cover, disks 16, of asbestos or equivalent material, being interposed between said bosses and the ends of the handle in order to obviate any possibility of the latter being charred, and consequently the connection between the handle and the top plate or cover becoming insecure. The top plate or cover is also provided centrally with an upwardly-projecting boss 17, terminating in a pivot-pinlS, and at opposite sides of said boss with the segmental grooves 19 in its under side and inward thereof with the transverse slots 20, the latter extending radially of the pivot-pin 21 designates a circular plate or disk journaled upon pin 18 and resting upon the boss 17, and said disk is provided with hand-lugs 22, by which it may be turned in one direction or the other, and with a pair of eccentric slots 2G designates locking-bolts which fit snugly against the underside of the top plate or cover and are provided with pins 26*,which project up through the radial slots 20 and eccentric slots 23, and carry bolts or rivets 24, washers being clamped down upon said pins by said bolts or rivets to eliminate all chance of pressure on the disk, which would make it diflicult to turn. Said locking-bolts are provided with extensions 27 at their outer ends, having beveled upper surfaces 28, which operate like wedges against the correspondingly-beveled upper sides of holes 7, and thereby draw the disk firmly down upon the boss 17 of the top plate or cover and the latter tightly down upon the hollow base portion of the iron.

To secure the top plate or cover in position, it is necessary to grasp the hand-lugs 22 be tween the thumb and finger and turn the disk in the direction indicated by the arrow, Fig. 4, and thereby through the medium of said eccentric slots force the locking-bolts 26 outward, as shown in Figs. 2 and 4.

To retract the locking-bolts in order that the top plate may be removed from the base portion, the hand-lugs are grasped and turned in the opposite direction to that indicated by the arrow. This action of course disposes the vertical pins 26 in the innerends of slots .30 and 23, and incidentally withdraws the bolt extensions 27 from the holes 7 in the side walls of the base portion.

29 designates a heat-arrester of substam tially the same configuration as the top plate or cover and arranged parallel with and beneath the same, being preferably of sheet metal and secured to the depending lugs 30 of the top plate by means of screws or rivets 31 or the equivalents of the same, and in order that this heat-arrester may be fitted down in the hollow base portion it is cut away at its rear end, as at 32, to avoid conflict with the vertical guide ribs or lugs 4 and the burner.

The heat arrester when in position fits snugly in the base portion of the iron and rests squarely upon the upper ends of pins or projections 10 and lugs 11, and is bent upward at its center to provide the central longitudinal groove 33 for a purpose which will presently appear, and in advance of its center it is out or slit slightly inward, so that the edges forward of such cuts or slits may be bent upward about parallel with its side margins to form openings or slots bounded at their inner sides by flanges 34, formed by bending the arrester as above described, said flanges serving to reliablydeflect the burned gases outward through the recesses of the iron as such gases emerge through the slots or openings formed in part by the arrester.

A burner of the Bunsen type is constructed as followsthat is to say: 35 designates an approximately inverted-U-shaped casting provided with vertical grooves 36 in its opposite sides in order that when said casting is slid vertically down between the guide ribs or lugs 4: it will be held reliably in position. Projecting from the rear arm of the casting is the usual stufling-box to prevent leakage, carrying a needle-Valve 38, and projecting forward from the front arm of said casting and centrally of the hollow base portion is a burner-pipe 39, provided with alarge numberof jet-orifices in its under side. 4-1 designates the supply-tube,which is arranged vertically above the burner-tube 39 and fits snugly in the groove 33 of the heat-arrester. Said pipe at its rear'end connects with the front end of the casting 35, and projecting through the notch 2 in the front end of the base portion of the iron is bent upward and carries an oil-tank 42, provided with a removable plug 43 in order that the tank may be easily filled or charged with gasolene or other oil suitable for the purpose. The burner is supported in the horizontal position shown in Fig. 1 by resting in the notches 2 and 3. I make no claim to it, as burners of precisely the same construction and type are in common use.

In the practical use of this iron a small quantity of gasolene is first poured into the channel 9 in the base of the iron. The generator is then fitted to the iron, as described, and said oil ignited. The flames from the burning oil envelop the burner-pipe 39 and impinge directly upon the supply-pipe 41, so that in a short time the latter is heated sufficiently to vaporize the oil which it contains. The operator then opens the needle-val ve and permits the vapor generated in pipe 41 to be discharged forward into the burner-tube 39, this discharge, of course, drawing in sufficient air to mix with the vapor, the mixture of such air and vapor being efifected in pipe 39, and as it escapes under pressure through the orifices it is ignited by the flame of the burning oil in channel 9, which supply is by this time almost exhausted. The top plate or cover carrying the handle is fitted down upon the base portion, with the bent portion of the heat-arrester embracing the supplypipe 41. The disk is then turned in the manner described to interlock the locking-bolts with the holes 7 of the base portion. The flame from said burner-pipe is directed down upon the bottom of the base portion and toward the pins or projections 10, which, being staggered with relation to each other, intercept the flow of gas, and confining it close to the tube insure its complete combustion, and the said pins or projections receive the direct benefit of most of the heat generated and conduct it to the point where it is neededthat is, to the bottom of the ironing or IIO hollow base portion. Very little of the heat is conducted upward, because the upper ends of the pins or projections are of relatively small diameter and contact with the "thin metal heat-arrester, arranged with an airspace between it and the top plate or cover, this air-space being provided as a further precaution against the upward transmission of the heat.

The heat-arrester being of sheet metal and resting upon the pins or projections 10 11 is of such relative heat-conducting proportions that it conduct-s but little heat proportionately upward, leaving most of the heat generated to be conducted to the ironing-surface, and as a result the handle is kept cool and a holder is not needed.

From the above description it will be apparent that I have produced a self-heating sad-iron which embodies the features of advantage enumerated as desirable in the statement of invention, and it will be understood that the device is susceptible of various modifications as to details of construction, arrangement, form, and proportion without departing from the spirit and scope or sacrificing any of the advantages of the invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A self-heating sad-iron, consisting of a hollow base portion having its walls provided with holes and upwardly-projecting cars, a top plate therefor provided with radial slots 20, and with recesses in its under side to receive said ears, a rotatable disk mounted on the top plate, provided with. eccentric slots intersecting the radial slots below, bolts extending vertically through said intersecting slots, and locking-bolts secured to the .vertical bolts at the under side of the top plate, for engagement with said holes, substantially as described.

2. A self-heating sad-iron, consisting of a hollow base portion having holes in its side walls whose upper sides slope downward and outward, a top plate for the base portion, locking-bolts at the under side of the same, and a rotatable disk mounted at the upper side of the top plate and connected to said locking-bolts, to cause their engagement or disengagement with the said holes, substantially as described.

3. A self-heating sad-iron, consisting of a hollow base portion having pins projecting upward from its bottom, a heat-generator seated in said base portion, a top plate for the base portion, a heat-arrester suspended from the top plate and resting on said pins and provided with a longitudinal groove in its under side to receive the adjacent part of the generator, and means for clamping the top plate down upon the base portion and the arrester upon the pins and generator, substantially as described.

4. A self-heating sad-iron, consisting of a hollow base portion having recesses in its side walls, a heat-generator in the base portion, a handle-carrying top plate for the base portion and bridging said recesses, and a heat-arrester fitting snugly in the base portion above the generator and recessed in its side edges and provided with flanges 34 inward of said recesses, said flanges serving to deflect the WILLIAM PITT.

Witnesses:

M. R. REMLEY, F. S. THRASHER. 

